Coated inserts for rough milling

US6767583B2 · kind B2 · utility

Assignee

• SANDVIK LTD · SE

Inventors

• Anders Nordgren · Nacka, SE
• Ingemar Hessman · Sandviken, SE
• Marian Mikus · Härnösand, SE

Key dates

• Filing date: Aug 13, 2003
• Grant date: Jul 27, 2004
• Expiry date: Aug 13, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/30
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Coated milling insert has a WC—Co cemented carbide with a low content of cubic carbides and a highly W-alloyed binder phase and a coating including an inner layer of TiCxNy with columnar grains followed by a layer of &kgr;-Al2O3 and a top layer of TiN. The coated milling insert is particularly useful for milling of grey cast iron with or without cast skin under wet conditions at low and moderate cutting speeds and milling of nodular cast iron and compacted graphite iron with or without cast skin under wet conditions at moderate cutting speeds.